#!/bin/sh
# NVRAM setup
#
# This file handles the NVRAM quirks of various hardware.

alias debug=${DEBUG:-:}

remap () {
	for type in lan wifi wan pppoe
	do
		for s in '' s
		do
			eval nvram set ${type}_ifname$s=\"$(nvram get ${type}_ifname$s|sed s/$1/$2/g)\" 
		done
	done
}

nvram_default() {
	[ -z "$(nvram get $1)" ] && nvram set "$1=$2"
}

nvram_set() { # for the linksys fixup part
	[ "$(nvram get "$1")" = "$2" -a "$2" != "" ] || {
		COMMIT=1
		/usr/sbin/nvram set "$1=$2"
	}
}

fixup_lan() { # fix for wrong lan_ifnames default
	lan_ifnames="$(nvram get lan_ifnames)"
	[ "${lan_ifnames%% *}" = "$1" ] || \
		nvram set lan_ifnames="$2"
}

# work around braindead CFE defaults in linksys routers
boardtype=$(nvram get boardtype)
boardnum=$(nvram get boardnum)
boardflags=$(($(nvram get boardflags)))
adm_switch="$(( ($boardflags & 0x80) >> 7 ))"

[ -n "$(nvram get vxkilled)" ] && boardtype=0 # don't mess with the ram settings on the hacked cfe
case "$(( $boardtype ))" in
	"1800") #0x708
		if [ "$adm_switch" = 0 ]; then
			nvram_set sdram_init "$(printf 0x%04x $(( $(/usr/sbin/nvram get sdram_init) | 0x0100 )))"
			[ "$COMMIT" = 1 ] && {
				nvram_set clkfreq 216
				nvram_set sdram_ncdl 0x0
				nvram_set pa0itssit 62
				nvram_set pa0b0 0x15eb
				nvram_set pa0b1 0xfa82
				nvram_set pa0b2 0xfe66
				nvram_set pa0maxpwr 0x4e
			}
		fi
	;;
	"1127") #0x467
		nvram_set sdram_init "$(printf 0x%04x $(( $(/usr/sbin/nvram get sdram_init) | 0x0100 )))"
		[ "$COMMIT" = 1 ] && {
			nvram_set sdram_ncdl 0x0
			nvram_set pa0itssit 62
			nvram_set pa0b0 0x168b
			nvram_set pa0b1 0xfabf
			nvram_set pa0b2 0xfeaf
			nvram_set pa0maxpwr 0x4e
		}
	;;
esac
[ "$COMMIT" = "1" ] && nvram commit

# linksys bug; use 'dhcpclient' or similar as lan_proto if you want to use dhcp
[ "$(nvram get lan_proto)" = "dhcp" ] && nvram unset lan_proto
nvram_default lan_proto static

# hacks for wrt54g 1.x hardware
[  "$boardnum"  = "42" \
-a "$boardtype" = "bcm94710dev" ] && {
	debug "### wrt54g 1.x hack ###"
	remap eth0 vlan2
	remap eth1 vlan1
	nvram_default vlan0hwname "et0"
	nvram_default vlan1hwname "et0"
	nvram_default lan_ifnames "vlan0 eth2"
	if nvram get lan_ifnames | grep vlan2 >/dev/null; then
		nvram_default vlan2hwname "et0"
		nvram_default vlan2ports "1 2 3 4 5*"
	else
		nvram_default vlan0ports "1 2 3 4 5*"
	fi
}

# hacks for asus wl-500g deluxe
[  "$boardnum"  = "45" \
-a "$boardtype" = "bcm95365r" ] && {
	debug "### wl-500g deluxe hacks ###"
	remap eth0.1 vlan0
	remap eth0 vlan1
	nvram_default vlan0hwname "et0"
	nvram_default vlan1hwname "et0"
	nvram_default lan_ifnames "vlan0 eth1"

	# set up the vlan*ports variables for the asus wl-500g deluxe
	# if they don't already exist 
	nvram_default vlan0ports "1 2 3 4 5*"
	nvram_default vlan1ports "0 5"
}

# wl-500g premium
[  "$boardnum"  = "45" \
-a "$boardtype" = "0x042f" ] && {
	debug "### wl-500g premium hacks ###"
	[ -z "$(nvram get lan_ifnames_t)" ] || {
		# hasn't been remapped yet, revert the vlan1 config as well, because
		# it defaults to "0 5u", which we can't use.
		# use lan_ifnames_t as an indicator of whether the config was made
		# by the original firmware.
		nvram unset vlan1ports
		nvram unset lan_ifnames_t
	}
	remap eth0.1 vlan0
	remap eth0 vlan1
	remap eth1 eth2

	nvram_default lan_ifnames "vlan0 eth2"
	nvram_default wan_ifname "vlan1"

	nvram_default vlan0hwname "et0"
	nvram_default vlan1hwname "et0"

	# set up the vlan*ports variables for the asus wl-500g premium
	# if they don't already exist 
	nvram_default vlan0ports "1 2 3 4 5*"
	nvram_default vlan1ports "0 5"
}

# hacks for asus
[ "$boardnum" = "asusX" ] && {
	debug "### asus hacks ###"
	case "$(($(nvram get et1phyaddr)))" in
		1) # WL-HDD
			lan=eth1
			wan=none
		;;
		*)
			lan=eth0
			[ "$boardtype" = "bcm94710dev" ] && wan=eth1 || wan=none
		;;
	esac

	fixup_lan "$lan" "$lan eth2"
	nvram_default wan_ifname "$wan"
}

# hacks for wap54g hardware
[  "$boardnum" = "2" \
-o "$boardnum" = "1024" ] && {
	debug "### wap54g hack ###"
	nvram_default wan_ifname "none"
	nvram_default lan_ifnames "eth0 eth1"
}

# hacks for buffalo wla2-g54l
[  "$boardnum" = "00" \
-a "$product_name" = "Product_name" \
-o "$product_name" = "WLA2-G54L" ] && {
	debug "### wla2-g54l hacks ###"
	nvram_default wan_ifname "none"
	fixup_lan "vlan0" "vlan0 eth1"
}

# wrtsl54gs vlan defaults
[  "$boardtype" = "0x042f" \
-a "$boardnum" = "42" \
-a "$boardflags" = "24" ] && {
	nvram_default vlan0hwname "et0"
	nvram_default vlan0ports "0 1 2 3 5u"
	nvram_default vlan1hwname "et0"
	nvram_default vlan1ports "4 5"
	nvram_default lan_proto "static"
	nvram_default lan_ifnames "eth0 eth2"
	nvram_default wan_ifname "eth1"
	nvram_default wan_device "eth1"
}

# needed at least for wrt54gs v1.1 and wrt54g v2.0, v2.2
[ \! -z "$(nvram get boardrev)" ] && {
	nvram_default wl0id 0x4320
}

# motorola boards
[  "$boardnum" != "00" ] && nvram unset wl0gpio0 

# defaults, can be overridden by hardware-specific nvram_default commands
nvram_default lan_ifname "br0"
nvram_default lan_ifnames "vlan0 eth1 eth2"

nvram_default wan_ifname "vlan1"
nvram_default wan_device "vlan1"
nvram_default wan_proto "dhcp"

nvram_default wl0_ssid OpenWrt
nvram_default wl0_mode ap
nvram_default wl0_infra 1
nvram_default wl0_radio 1

nvram_default vlan0ports "1 2 3 4 5*"
nvram_default vlan1ports "0 5"

WAN_PROTO="$(nvram get wan_proto)"
WAN_IFNAME="$(nvram get wan_ifname)"
case "$WAN_PROTO" in
	pp*|wwan) [ "${WAN_IFNAME%%[0-9]*}" = "ppp" ] || nvram set wan_ifname=ppp0;;
	*) [ "${WAN_IFNAME%%[0-9]*}" = "ppp" ] && nvram set wan_ifname="$(nvram get wan_device)";;
esac

[ "$(nvram get il0macaddr)" = "00:90:4c:5f:00:2a" ] && {
	# if default wifi mac, set two higher than the lan mac
	nvram set il0macaddr=$(nvram get et0macaddr|
	awk '{OFS=FS=":";for(x=7,y=2;--x;){$x=sprintf("%02x",(y+="0x"$x)%256);y/=256}print}')
}
